Lighting fixture arm



FIG. 1 is a front view of the lighting fixture arm;

FIG. 2 is a top view of the lighting fixture arm;

FIG. 3 is a rear view of the lighting fixture arm;

FIG. 4 is a bottom view of the lighting fixture arm;

FIG. 5 is a left side view of the lighting fixture arm; and,

FIG. 6 is a right side view of the lighting fixture arm.

The broken lines showing the glass shade are for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a lighting fixture arm, as shown and described. 